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Providing information and descriptions of long unsolved cases of missing children, including endangered, runaways as well as victims of abductions.

Providing information and descriptions of long unsolved cases of missing children, including endangered, runaways as well as victims of abductions.

Providing information and descriptions of long unsolved cases of missing children, including endangered, runaways as well as victims of abductions.

Providing information and descriptions of long unsolved cases of missing children, including endangered, runaways as well as victims of abductions.

A woman dies in her sleep after her character has changed drastically for no reason, but there does not seem to be any evidence of the cause of death; a drunk man wants to cycle to his friend at night and ends up dead on the roadside.

A man is found dead in his hotel room; a gun and lots of blood are found at the scene, but Dr. G is yet to confirm if this was a suicide or a murder.

A 29-year old dies in his sleep after partying with his friends.

When a college student is found murdered in his Arlington, Texas, apartment, investigators suspect the kindhearted victim's generosity may have led a killer to his door.

An elementary school teacher goes missing after her first day at a new job, and investigators sift through clues to uncover the heartbreaking truth behind her sudden disappearance.

In La Jolla, Calif., telemarketing manager David Stevens' charred body is found in his burned-out car, and detectives encounter a rogue's gallery of suspects while looking for his killer.

After a man hits his sister-in-law with the flat side of a machete, vigilante villagers give him a taste of his own medicine; a gas station attendant fights off a knife-wielding robber; an armed robber targets a pawn shop.

A knife-wielding woman threatens to kill her hostage, drawing a SWAT team into a volatile standoff; a robber pulls a gun on a law enforcement officer, triggering a shootout; a ruthless gunman makes a run toward a crowded restaurant.

A school bus driver fails a sobriety test while on the job; a brawl breaks out, allegedly involving several women; an old lady steals an amplifier.

Police try to keep the peace as anarchists clash with members of the Ku Klux Klan; protesters create a firewall in an attempt to hold off police; vigilantes deliver justice to a thief.

Friends stage a drunken demolition derby, forcing police to crash the party; an inebriated motorist gets a jolt; a 21st birthday bash erupts into a street brawl.

A feud between neighbors turns into a fight for survival; an assault on a spectator triggers a riot at a monster truck show; an enraged bicyclist uses a knife to slash a cab driver.

A crazed cat lover stopped by authorities leads animal control personnel to a grisly discovery; an officer laying down spike strips nearly becomes roadkill; a bank robber runs from police and into the path of a truck.

The best moments from the fast-paced clip show, exposing some of the most outrageous challenges the police have to face on the street.

When a young woman looking to find herself on a solo trip to Hawaii vanishes without a trace, police race against the clock to find her before it's too late.

Two strangers meet while backpacking through Thailand, and sparks fly, but this budding romance in paradise ends in a horrific tragedy.

The most obvious suspect is not always guilty.

Strangled prostitute; a stranger kills a woman in a van; a serial killer runs over his victims' bodies.

Yingying Zhang, a scholar with a bright future, goes missing after entering a mysterious car; what investigators uncover stuns her community and points to an unimaginable crime.

In Seattle, a young woman vanishes and her phone goes dark. As strange texts confuse family and friends, detectives lean on digital forensics and a badly damaged cellphone to uncover what happened and who was really using her device.

Suspects will do anything to avoid being arrested, including hiding in strange places.

A woman with scarce medical history is found dead; a prescription drug addict is found dead with two empty pill bottles.

The body of a 16-year-old girl is discovered nine months after her disappearance; forensic scientists find clues that paint a virtual portrait of her killer.

A young woman falls to her death in what appears to be a tragic accident; a forensic exam of photos taken at the scene tells a different story.

Haunted by her mother's long-ago disappearance, a woman undertakes an investigation of her own and stumbles upon a dark family secret.

The robbery and brutal murder of an elderly couple goes unsolved for 10 years; a forensic scientist makes history when he solves the crime.

Police rely on forensic science to reveal murder victims' pasts and expose those guilty of committing crimes of passion.

Two brothers force a bank president to empty his vault before abducting him and throwing him off a bridge.

A man and his common-law wife go on a three-month killing spree that leaves eight people dead before they are apprehended by agents.

Police officer Brian Fanion frantically called 911 for an ambulance, saying his wife, Amy, had shot herself and lay dying; when Fanion's fellow officers arrived at the house, the crime scene posed more questions than answers.

A search mission for three women missing in Yosemite Park turns to a murder investigation when two are discovered in the trunk of their burned out car.

Nicole Abusharif, 26, murders her partner Rebecca Klein for the insurance money, then leaves her body in the boot of her car for a night of drinking with her young lover, Rose.

Law student Adrienne Hickson fatally stabs her boyfriend Shawn Washington with the knife for her birthday cake when he helps his friends move instead of spending the day with her.

Just outside Athens, Wis., Kenneth Kunz finds four of his family members murdered and one missing; investigators determine whether it was his mother, a local farm boy, or the rumored family drug dealing connections that led to the brutal slayings.

The bullet-ridden bodies of two sisters are discovered in a house littered with mysterious clues.

A task force forms to combat the flow of Colombian cocaine into New York ports.

David Snow, the man behind the murder of a young husband and wife.

Shortly before Thanksgiving, a Philadelphia suburb is rocked by the murder of 67-year-old Alice Hufnagle.

Todd, a 17-year-old with learning disabilities, becomes obsessed with his special education teacher, Linda.

In Northport, Wash., the townspeople come to realize that isolation doesn't guarantee their safety when a 62-year-old woman is found murdered in her home at Thanksgiving.

Bare-bottomed bandits and partly clad party girls; a dozing drunk driver gets caught with his pants down; amateur strippers give officers a peep show; a drug-crazed nudist resists arrest.

An octogenarian hits 50 mph driving the wrong way on a freeway; a legendary bank robber holes up in her motor home, triggering a standoff; a gun-toting crook is overmatched by a little old lady.

Forensic scientists must work to prove murder when the victim's body is missing or destroyed.

Janet Stallcup is murdered in 1976; decades later, cutting-edge technology breaks the case open.

A forensic technique finally solves the decades-old mystery of Krisann Baxter's case.

In 1989 20-year-old Krista Martin's life is tragically cut short when an intruder interrupts her dinner, leading to an investigation spanning four decades.

Genetic genealogy unmasks a serial sexual predator terrorizing the Phoenix metropolitan area.

In 1989 20-year-old Krista Martin's life is tragically cut short when an intruder interrupts her dinner, leading to an investigation spanning four decades.

Genetic genealogy unmasks a serial sexual predator terrorizing the Phoenix metropolitan area.

Are you making the most of your Medicare coverage? In this program you will learn about the variety of Humana Medicare plans designed to fit your needs, your lifestyle, and your budget.

Two tenacious sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

Decades after Kathy Heckel mysteriously vanished, one detective believed he could solve the case.

Investigators unlock a tool that may help unveil the identity of a schoolteacher's killer.

The death of George Reeves ("Superman"); a prolific bank robber; a purportedly haunted New Mexico hotel. Also: a cache of cash falls from the sky.

A Florida ghost sighting; an oil tycoon's suspicious death. Also: a ship sinks off Georgia; a woman is accused of killing her boyfriend.

The Bermuda Triangle; a college student's disappearance; claims concerning therapeutic touch. Also: a mother goes on the lam.

A husband's murder may have been at the hands of his estranged wife; an embezzler vanishes. Also: the government's purported involvement in a treasure's disappearance.

Following treasure hunters as they seek a gold mine; an identity theft scheme involving accordion lessons for kids. Also: a family are taken hostage and robbed.

Recently found interrogation video of Scott Peterson, convicted of the 2002 killing of his wife, Laci, and their unborn son, is featured. Included are interviews with prosecutor Birgit Fladager; Peterson's former girlfriend, Amber Frey; and Laci's mother, Sharon Rocha.

Investigators examine a case involving a pregnant Tennessee resident who was murdered in her bedroom.

Police believed a pair of double homicides in Nebraska, five years apart, might be connected. Investigators working to solve the crimes feared the killer might strike again.